src/procheader.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2012 Hiroyuki Yamamoto and the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #include "claws-features.h"
  23 #endif
  24
  25 #include <glib.h>
  26 #include <glib/gi18n.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <stdlib.h>
  30 #include <time.h>
  31 #include <sys/stat.h>
  32
  33 #ifdef G_OS_WIN32
  34 #  include <w32lib.h>
  35 #endif
  36
  37 #include "procheader.h"
  38 #include "procmsg.h"
  39 #include "codeconv.h"
  40 #include "prefs_common.h"
  41 #include "utils.h"
  42 #include "defs.h"
  43
  44 #define BUFFSIZE        8192
  45
  46 static gchar monthstr[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
  47
  48 typedef char *(*getlinefunc) (char *, size_t, void *);
  49 typedef int (*peekcharfunc) (void *);
  50 typedef int (*getcharfunc) (void *);
  51 typedef gint (*get_one_field_func) (gchar *, size_t, void *, HeaderEntry[]);
  52
  53 static gint string_get_one_field(gchar *buf, size_t len, char **str,
  54                                  HeaderEntry hentry[]);
  55
  56 static char *string_getline(char *buf, size_t len, char **str);
  57 static int string_peekchar(char **str);
  58 static int file_peekchar(FILE *fp);
  59 static gint generic_get_one_field(gchar *buf, size_t len, void *data,
  60                                   HeaderEntry hentry[],
  61                                   getlinefunc getline,
  62                                   peekcharfunc peekchar,
  63                                   gboolean unfold);
  64 static MsgInfo *parse_stream(void *data, gboolean isstring, MsgFlags flags,
  65                              gboolean full, gboolean decrypted);
  66
  67
  68 gint procheader_get_one_field(gchar *buf, size_t len, FILE *fp,
  69                               HeaderEntry hentry[])
  70 {
  71         return generic_get_one_field(buf, len, fp, hentry,
  72                                      (getlinefunc)fgets_crlf, (peekcharfunc)file_peekchar,
  73                                      TRUE);
  74 }
  75
  76 static gint string_get_one_field(gchar *buf, size_t len, char **str,
  77                                  HeaderEntry hentry[])
  78 {
  79         return generic_get_one_field(buf, len, str, hentry,
  80                                      (getlinefunc)string_getline,
  81                                      (peekcharfunc)string_peekchar,
  82                                      TRUE);
  83 }
  84
  85 static char *string_getline(char *buf, size_t len, char **str)
  86 {
  87         gboolean is_cr = FALSE;
  88         gboolean last_was_cr = FALSE;
  89
  90         if (!*str || !**str)
  91                 return NULL;
  92
  93         for (; **str && len > 1; --len) {
  94                 is_cr = (**str == '\r');
  95                 if ((*buf++ = *(*str)++) == '\n') {
  96                     break;
  97                 }
  98                 if (last_was_cr) {
  99                         *(--buf) = '\n';
 100                         buf++;
 101                     break;
 102                 }
 103                 last_was_cr = is_cr;
 104         }
 105
 106         *buf = '\0';
 107
 108         return buf;
 109 }
 110
 111 static int string_peekchar(char **str)
 112 {
 113         return **str;
 114 }
 115
 116 static int file_peekchar(FILE *fp)
 117 {
 118         return ungetc(getc(fp), fp);
 119 }
 120
 121 static gint generic_get_one_field(gchar *buf, size_t len, void *data,
 122                           HeaderEntry *hentry,
 123                           getlinefunc getline, peekcharfunc peekchar,
 124                           gboolean unfold)
 125 {
 126         gint nexthead;
 127         gint hnum = 0;
 128         HeaderEntry *hp = NULL;
 129
 130         if (hentry != NULL) {
 131                 /* skip non-required headers */
 132                 do {
 133                         do {
 134                                 if (getline(buf, len, data) == NULL)
 135                                         return -1;
 136                                 if (buf[0] == '\r' || buf[0] == '\n')
 137                                         return -1;
 138                         } while (buf[0] == ' ' || buf[0] == '\t');
 139
 140                         for (hp = hentry, hnum = 0; hp->name != NULL;
 141                              hp++, hnum++) {
 142                                 if (!g_ascii_strncasecmp(hp->name, buf,
 143                                                  strlen(hp->name)))
 144                                         break;
 145                         }
 146                 } while (hp->name == NULL);
 147         } else {
 148                 if (getline(buf, len, data) == NULL) return -1;
 149                 if (buf[0] == '\r' || buf[0] == '\n') return -1;
 150         }
 151
 152         /* unfold line */
 153         while (1) {
 154                 nexthead = peekchar(data);
 155                 /* ([*WSP CRLF] 1*WSP) */
 156                 if (nexthead == ' ' || nexthead == '\t') {
 157                         size_t buflen;
 158                         gboolean skiptab = (nexthead == '\t');
 159                         /* trim previous trailing \n if requesting one header or
 160                          * unfolding was requested */
 161                         if ((!hentry && unfold) || (hp && hp->unfold))
 162                                 strretchomp(buf);
 163
 164                         buflen = strlen(buf);
 165
 166                         /* concatenate next line */
 167                         if ((len - buflen) > 2) {
 168                                 if (getline(buf + buflen, len - buflen, data) == NULL)
 169                                         break;
 170                                 if (skiptab) { /* replace tab with space */
 171                                         *(buf + buflen) = ' ';
 172                                 }
 173                         } else
 174                                 break;
 175                 } else {
 176                         /* remove trailing new line */
 177                         strretchomp(buf);
 178                         break;
 179                 }
 180         }
 181
 182         return hnum;
 183 }
 184
 185 gint procheader_get_one_field_asis(gchar *buf, size_t len, FILE *fp)
 186 {
 187         return generic_get_one_field(buf, len, fp, NULL,
 188                                      (getlinefunc)fgets_crlf,
 189                                      (peekcharfunc)file_peekchar,
 190                                      FALSE);
 191 }
 192
 193 GPtrArray *procheader_get_header_array_asis(FILE *fp)
 194 {
 195         gchar buf[BUFFSIZE];
 196         GPtrArray *headers;
 197         Header *header;
 198
 199         cm_return_val_if_fail(fp != NULL, NULL);
 200
 201         headers = g_ptr_array_new();
 202
 203         while (procheader_get_one_field_asis(buf, sizeof(buf), fp) != -1) {
 204                 if ((header = procheader_parse_header(buf)) != NULL)
 205                         g_ptr_array_add(headers, header);
 206         }
 207
 208         return headers;
 209 }
 210
 211 void procheader_header_array_destroy(GPtrArray *harray)
 212 {
 213         gint i;
 214         Header *header;
 215
 216         for (i = 0; i < harray->len; i++) {
 217                 header = g_ptr_array_index(harray, i);
 218                 procheader_header_free(header);
 219         }
 220
 221         g_ptr_array_free(harray, TRUE);
 222 }
 223
 224 void procheader_header_free(Header *header)
 225 {
 226         if (!header) return;
 227
 228         g_free(header->name);
 229         g_free(header->body);
 230         g_free(header);
 231 }
 232
 233 /*
 234   tests whether two headers' names are equal
 235   remove the trailing ':' or ' ' before comparing
 236 */
 237
 238 gboolean procheader_headername_equal(char * hdr1, char * hdr2)
 239 {
 240         int len1;
 241         int len2;
 242
 243         len1 = strlen(hdr1);
 244         len2 = strlen(hdr2);
 245         if (hdr1[len1 - 1] == ':')
 246                 len1--;
 247         if (hdr2[len2 - 1] == ':')
 248                 len2--;
 249         if (len1 != len2)
 250                 return 0;
 251
 252         return (g_ascii_strncasecmp(hdr1, hdr2, len1) == 0);
 253 }
 254
 255 /*
 256   parse headers, for example :
 257   From: dinh@enseirb.fr becomes :
 258   header->name = "From:"
 259   header->body = "dinh@enseirb.fr"
 260  */
 261 static gboolean header_is_addr_field(const gchar *hdr)
 262 {
 263         static char *addr_headers[] = {
 264                                 "To:",
 265                                 "Cc:",
 266                                 "Bcc:",
 267                                 "From:",
 268                                 "Reply-To:",
 269                                 "Followup-To:",
 270                                 "Followup-and-Reply-To:",
 271                                 "Disposition-Notification-To:",
 272                                 "Return-Receipt-To:",
 273                                 NULL};
 274         int i;
 275
 276         if (!hdr)
 277                 return FALSE;
 278
 279         for (i = 0; addr_headers[i] != NULL; i++)
 280                 if (!strcasecmp(hdr, addr_headers[i]))
 281                         return FALSE;
 282
 283         return FALSE;
 284 }
 285
 286 Header * procheader_parse_header(gchar * buf)
 287 {
 288         gchar *p;
 289         Header * header;
 290         gboolean addr_field = FALSE;
 291
 292         if ((*buf == ':') || (*buf == ' '))
 293                 return NULL;
 294
 295         for (p = buf; *p ; p++) {
 296                 if ((*p == ':') || (*p == ' ')) {
 297                         header = g_new(Header, 1);
 298                         header->name = g_strndup(buf, p - buf + 1);
 299                         addr_field = header_is_addr_field(header->name);
 300                         p++;
 301                         while (*p == ' ' || *p == '\t') p++;
 302                         header->body = conv_unmime_header(p, NULL, addr_field);
 303                         return header;
 304                 }
 305         }
 306         return NULL;
 307 }
 308
 309 void procheader_get_header_fields(FILE *fp, HeaderEntry hentry[])
 310 {
 311         gchar buf[BUFFSIZE];
 312         HeaderEntry *hp;
 313         gint hnum;
 314         gchar *p;
 315
 316         if (hentry == NULL) return;
 317
 318         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 319                != -1) {
 320                 hp = hentry + hnum;
 321
 322                 p = buf + strlen(hp->name);
 323                 while (*p == ' ' || *p == '\t') p++;
 324
 325                 if (hp->body == NULL)
 326                         hp->body = g_strdup(p);
 327                 else if (procheader_headername_equal(hp->name, "To") ||
 328                          procheader_headername_equal(hp->name, "Cc")) {
 329                         gchar *tp = hp->body;
 330                         hp->body = g_strconcat(tp, ", ", p, NULL);
 331                         g_free(tp);
 332                 }
 333         }
 334 }
 335
 336 MsgInfo *procheader_parse_file(const gchar *file, MsgFlags flags,
 337                                gboolean full, gboolean decrypted)
 338 {
 339         struct stat s;
 340         FILE *fp;
 341         MsgInfo *msginfo;
 342
 343         if (g_stat(file, &s) < 0) {
 344                 FILE_OP_ERROR(file, "stat");
 345                 return NULL;
 346         }
 347         if (!S_ISREG(s.st_mode))
 348                 return NULL;
 349
 350         if ((fp = g_fopen(file, "rb")) == NULL) {
 351                 FILE_OP_ERROR(file, "fopen");
 352                 return NULL;
 353         }
 354
 355         msginfo = procheader_parse_stream(fp, flags, full, decrypted);
 356         fclose(fp);
 357
 358         if (msginfo) {
 359                 msginfo->size = s.st_size;
 360                 msginfo->mtime = s.st_mtime;
 361         }
 362
 363         return msginfo;
 364 }
 365
 366 MsgInfo *procheader_parse_str(const gchar *str, MsgFlags flags, gboolean full,
 367                               gboolean decrypted)
 368 {
 369         return parse_stream(&str, TRUE, flags, full, decrypted);
 370 }
 371
 372 enum
 373 {
 374         H_DATE          = 0,
 375         H_FROM          = 1,
 376         H_TO            = 2,
 377         H_CC            = 3,
 378         H_NEWSGROUPS    = 4,
 379         H_SUBJECT       = 5,
 380         H_MSG_ID        = 6,
 381         H_REFERENCES    = 7,
 382         H_IN_REPLY_TO   = 8,
 383         H_CONTENT_TYPE  = 9,
 384         H_SEEN          = 10,
 385         H_STATUS        = 11,
 386         H_X_STATUS      = 12,
 387         H_FROM_SPACE    = 13,
 388         H_SC_PLANNED_DOWNLOAD = 14,
 389         H_SC_MESSAGE_SIZE = 15,
 390         H_FACE          = 16,
 391         H_X_FACE        = 17,
 392         H_DISPOSITION_NOTIFICATION_TO = 18,
 393         H_RETURN_RECEIPT_TO = 19,
 394         H_SC_PARTIALLY_RETRIEVED = 20,
 395         H_SC_ACCOUNT_SERVER = 21,
 396         H_SC_ACCOUNT_LOGIN = 22,
 397         H_LIST_POST        = 23,
 398         H_LIST_SUBSCRIBE   = 24,
 399         H_LIST_UNSUBSCRIBE = 25,
 400         H_LIST_HELP        = 26,
 401         H_LIST_ARCHIVE     = 27,
 402         H_LIST_OWNER       = 28,
 403 };
 404
 405 static HeaderEntry hentry_full[] = {{"Date:",           NULL, FALSE},
 406                                    {"From:",            NULL, TRUE},
 407                                    {"To:",              NULL, TRUE},
 408                                    {"Cc:",              NULL, TRUE},
 409                                    {"Newsgroups:",      NULL, TRUE},
 410                                    {"Subject:",         NULL, TRUE},
 411                                    {"Message-ID:",      NULL, FALSE},
 412                                    {"References:",      NULL, FALSE},
 413                                    {"In-Reply-To:",     NULL, FALSE},
 414                                    {"Content-Type:",    NULL, FALSE},
 415                                    {"Seen:",            NULL, FALSE},
 416                                    {"Status:",          NULL, FALSE},
 417                                    {"X-Status:",        NULL, FALSE},
 418                                    {"From ",            NULL, FALSE},
 419                                    {"SC-Marked-For-Download:", NULL, FALSE},
 420                                    {"SC-Message-Size:", NULL, FALSE},
 421                                    {"Face:",            NULL, FALSE},
 422                                    {"X-Face:",          NULL, FALSE},
 423                                    {"Disposition-Notification-To:", NULL, FALSE},
 424                                    {"Return-Receipt-To:", NULL, FALSE},
 425                                    {"SC-Partially-Retrieved:", NULL, FALSE},
 426                                    {"SC-Account-Server:", NULL, FALSE},
 427                                    {"SC-Account-Login:",NULL, FALSE},
 428                                    {"List-Post:",       NULL, TRUE},
 429                                    {"List-Subscribe:",  NULL, TRUE},
 430                                    {"List-Unsubscribe:",NULL, TRUE},
 431                                    {"List-Help:",       NULL, TRUE},
 432                                    {"List-Archive:",    NULL, TRUE},
 433                                    {"List-Owner:",      NULL, TRUE},
 434                                    {NULL,               NULL, FALSE}};
 435
 436 static HeaderEntry hentry_short[] = {{"Date:",          NULL, FALSE},
 437                                     {"From:",           NULL, TRUE},
 438                                     {"To:",             NULL, TRUE},
 439                                     {"Cc:",             NULL, TRUE},
 440                                     {"Newsgroups:",     NULL, TRUE},
 441                                     {"Subject:",        NULL, TRUE},
 442                                     {"Message-ID:",     NULL, FALSE},
 443                                     {"References:",     NULL, FALSE},
 444                                     {"In-Reply-To:",    NULL, FALSE},
 445                                     {"Content-Type:",   NULL, FALSE},
 446                                     {"Seen:",           NULL, FALSE},
 447                                     {"Status:",         NULL, FALSE},
 448                                     {"X-Status:",       NULL, FALSE},
 449                                     {"From ",           NULL, FALSE},
 450                                     {"SC-Marked-For-Download:", NULL, FALSE},
 451                                     {"SC-Message-Size:",NULL, FALSE},
 452                                     {NULL,              NULL, FALSE}};
 453
 454 static HeaderEntry* procheader_get_headernames(gboolean full)
 455 {
 456         return full ? hentry_full : hentry_short;
 457 }
 458
 459 MsgInfo *procheader_parse_stream(FILE *fp, MsgFlags flags, gboolean full,
 460                                  gboolean decrypted)
 461 {
 462         return parse_stream(fp, FALSE, flags, full, decrypted);
 463 }
 464
 465 static MsgInfo *parse_stream(void *data, gboolean isstring, MsgFlags flags,
 466                              gboolean full, gboolean decrypted)
 467 {
 468         MsgInfo *msginfo;
 469         MsgInfoAvatar *avatar;
 470         gchar buf[BUFFSIZE];
 471         gchar *p, *tmp;
 472         gchar *hp;
 473         HeaderEntry *hentry;
 474         gint hnum;
 475         void *orig_data = data;
 476
 477         get_one_field_func get_one_field =
 478                 isstring ? (get_one_field_func)string_get_one_field
 479                          : (get_one_field_func)procheader_get_one_field;
 480
 481         hentry = procheader_get_headernames(full);
 482
 483         if (MSG_IS_QUEUED(flags) || MSG_IS_DRAFT(flags)) {
 484                 while (get_one_field(buf, sizeof(buf), data, NULL) != -1) {
 485                         if ((!strncmp(buf, "X-Claws-End-Special-Headers: 1",
 486                                 strlen("X-Claws-End-Special-Headers:"))) ||
 487                             (!strncmp(buf, "X-Sylpheed-End-Special-Headers: 1",
 488                                 strlen("X-Sylpheed-End-Special-Headers:"))))
 489                                 break;
 490                         /* from other mailers */
 491                         if (!strncmp(buf, "Date: ", 6)
 492                         ||  !strncmp(buf, "To: ", 4)
 493                         ||  !strncmp(buf, "From: ", 6)
 494                         ||  !strncmp(buf, "Subject: ", 9)) {
 495                                 if (isstring)
 496                                         data = orig_data;
 497                                 else
 498                                         rewind((FILE *)data);
 499                                 break;
 500                         }
 501                 }
 502         }
 503
 504         msginfo = procmsg_msginfo_new();
 505
 506         if (flags.tmp_flags || flags.perm_flags)
 507                 msginfo->flags = flags;
 508         else
 509                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_NEW | MSG_UNREAD);
 510
 511         msginfo->inreplyto = NULL;
 512
 513         while ((hnum = get_one_field(buf, sizeof(buf), data, hentry))
 514                != -1) {
 515                 hp = buf + strlen(hentry[hnum].name);
 516                 while (*hp == ' ' || *hp == '\t') hp++;
 517
 518                 switch (hnum) {
 519                 case H_DATE:
 520                         if (msginfo->date) break;
 521                         msginfo->date_t =
 522                                 procheader_date_parse(NULL, hp, 0);
 523                         if (g_utf8_validate(hp, -1, NULL)) {
 524                                 msginfo->date = g_strdup(hp);
 525                         } else {
 526                                 gchar *utf = conv_codeset_strdup(
 527                                         hp,
 528                                         conv_get_locale_charset_str_no_utf8(),
 529                                         CS_INTERNAL);
 530                                 if (utf == NULL ||
 531                                     !g_utf8_validate(utf, -1, NULL)) {
 532                                         g_free(utf);
 533                                         utf = g_malloc(strlen(buf)*2+1);
 534                                         conv_localetodisp(utf,
 535                                                 strlen(hp)*2+1, hp);
 536                                 }
 537                                 msginfo->date = utf;
 538                         }
 539                         break;
 540                 case H_FROM:
 541                         if (msginfo->from) break;
 542                         msginfo->from = conv_unmime_header(hp, NULL, TRUE);
 543                         msginfo->fromname = procheader_get_fromname(msginfo->from);
 544                         remove_return(msginfo->from);
 545                         remove_return(msginfo->fromname);
 546                         break;
 547                 case H_TO:
 548                         tmp = conv_unmime_header(hp, NULL, TRUE);
 549                         remove_return(tmp);
 550                         if (msginfo->to) {
 551                                 p = msginfo->to;
 552                                 msginfo->to =
 553                                         g_strconcat(p, ", ", tmp, NULL);
 554                                 g_free(p);
 555                         } else
 556                                 msginfo->to = g_strdup(tmp);
 557                         g_free(tmp);
 558                         break;
 559                 case H_CC:
 560                         tmp = conv_unmime_header(hp, NULL, TRUE);
 561                         remove_return(tmp);
 562                         if (msginfo->cc) {
 563                                 p = msginfo->cc;
 564                                 msginfo->cc =
 565                                         g_strconcat(p, ", ", tmp, NULL);
 566                                 g_free(p);
 567                         } else
 568                                 msginfo->cc = g_strdup(tmp);
 569                         g_free(tmp);
 570                         break;
 571                 case H_NEWSGROUPS:
 572                         if (msginfo->newsgroups) {
 573                                 p = msginfo->newsgroups;
 574                                 msginfo->newsgroups =
 575                                         g_strconcat(p, ",", hp, NULL);
 576                                 g_free(p);
 577                         } else
 578                                 msginfo->newsgroups = g_strdup(hp);
 579                         break;
 580                 case H_SUBJECT:
 581                         if (msginfo->subject) break;
 582                         msginfo->subject = conv_unmime_header(hp, NULL, FALSE);
 583                         unfold_line(msginfo->subject);
 584                        break;
 585                 case H_MSG_ID:
 586                         if (msginfo->msgid) break;
 587
 588                         extract_parenthesis(hp, '<', '>');
 589                         remove_space(hp);
 590                         msginfo->msgid = g_strdup(hp);
 591                         break;
 592                 case H_REFERENCES:
 593                         msginfo->references =
 594                                 references_list_prepend(msginfo->references,
 595                                                         hp);
 596                         break;
 597                 case H_IN_REPLY_TO:
 598                         if (msginfo->inreplyto) break;
 599
 600                         eliminate_parenthesis(hp, '(', ')');
 601                         if ((p = strrchr(hp, '<')) != NULL &&
 602                             strchr(p + 1, '>') != NULL) {
 603                                 extract_parenthesis(p, '<', '>');
 604                                 remove_space(p);
 605                                 if (*p != '\0')
 606                                         msginfo->inreplyto = g_strdup(p);
 607                         }
 608                         break;
 609                 case H_CONTENT_TYPE:
 610                         if (!g_ascii_strncasecmp(hp, "multipart/", 10))
 611                                 MSG_SET_TMP_FLAGS(msginfo->flags, MSG_MULTIPART);
 612                         break;
 613 #ifdef ALLOW_HEADER_HINT
 614                 case H_SEEN:
 615                         /* mnews Seen header */
 616                         MSG_UNSET_PERM_FLAGS(msginfo->flags, MSG_NEW|MSG_UNREAD);
 617                         break;
 618 #endif
 619                 case H_FACE:
 620                         if (!msginfo->extradata)
 621                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 622                         avatar = g_new0(MsgInfoAvatar, 1);
 623                         avatar->avatar_id = AVATAR_FACE;
 624                         avatar->avatar_src = g_strdup(hp);
 625                         msginfo->extradata->avatars = g_slist_append(msginfo->extradata->avatars, avatar);
 626                         break;
 627                 case H_X_FACE:
 628                         if (!msginfo->extradata)
 629                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 630                         avatar = g_new0(MsgInfoAvatar, 1);
 631                         avatar->avatar_id = AVATAR_XFACE;
 632                         avatar->avatar_src = g_strdup(hp);
 633                         msginfo->extradata->avatars = g_slist_append(msginfo->extradata->avatars, avatar);
 634                         break;
 635                 case H_DISPOSITION_NOTIFICATION_TO:
 636                         if (!msginfo->extradata)
 637                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 638                         if (msginfo->extradata->dispositionnotificationto) break;
 639                         msginfo->extradata->dispositionnotificationto = g_strdup(hp);
 640                         break;
 641                 case H_RETURN_RECEIPT_TO:
 642                         if (!msginfo->extradata)
 643                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 644                         if (msginfo->extradata->returnreceiptto) break;
 645                         msginfo->extradata->returnreceiptto = g_strdup(hp);
 646                         break;
 647 /* partial download infos */
 648                 case H_SC_PARTIALLY_RETRIEVED:
 649                         if (!msginfo->extradata)
 650                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 651                         if (msginfo->extradata->partial_recv) break;
 652                         msginfo->extradata->partial_recv = g_strdup(hp);
 653                         break;
 654                 case H_SC_ACCOUNT_SERVER:
 655                         if (!msginfo->extradata)
 656                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 657                         if (msginfo->extradata->account_server) break;
 658                         msginfo->extradata->account_server = g_strdup(hp);
 659                         break;
 660                 case H_SC_ACCOUNT_LOGIN:
 661                         if (!msginfo->extradata)
 662                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 663                         if (msginfo->extradata->account_login) break;
 664                         msginfo->extradata->account_login = g_strdup(hp);
 665                         break;
 666                 case H_SC_MESSAGE_SIZE:
 667                         if (msginfo->total_size) break;
 668                         msginfo->total_size = atoi(hp);
 669                         break;
 670                 case H_SC_PLANNED_DOWNLOAD:
 671                         msginfo->planned_download = atoi(hp);
 672                         break;
 673 /* end partial download infos */
 674 #ifdef ALLOW_HEADER_HINT
 675                 case H_STATUS:
 676                         if (strchr(hp, 'R') != NULL)
 677                                 MSG_UNSET_PERM_FLAGS(msginfo->flags, MSG_UNREAD);
 678                         if (strchr(hp, 'O') != NULL)
 679                                 MSG_UNSET_PERM_FLAGS(msginfo->flags, MSG_NEW);
 680                         if (strchr(hp, 'U') != NULL)
 681                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_UNREAD);
 682                         break;
 683                 case H_X_STATUS:
 684                         if (strchr(hp, 'D') != NULL)
 685                                 MSG_SET_PERM_FLAGS(msginfo->flags,
 686                                               MSG_REALLY_DELETED);
 687                         if (strchr(hp, 'F') != NULL)
 688                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_MARKED);
 689                         if (strchr(hp, 'd') != NULL)
 690                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_DELETED);
 691                         if (strchr(hp, 'r') != NULL)
 692                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_REPLIED);
 693                         if (strchr(hp, 'f') != NULL)
 694                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_FORWARDED);
 695                         break;
 696 #endif
 697                 case H_FROM_SPACE:
 698                         if (msginfo->fromspace) break;
 699                         msginfo->fromspace = g_strdup(hp);
 700                         remove_return(msginfo->fromspace);
 701                         break;
 702 /* list infos */
 703                 case H_LIST_POST:
 704                         if (!msginfo->extradata)
 705                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 706                         if (msginfo->extradata->list_post) break;
 707                         msginfo->extradata->list_post = g_strdup(hp);
 708                         break;
 709                 case H_LIST_SUBSCRIBE:
 710                         if (!msginfo->extradata)
 711                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 712                         if (msginfo->extradata->list_subscribe) break;
 713                         msginfo->extradata->list_subscribe = g_strdup(hp);
 714                         break;
 715                 case H_LIST_UNSUBSCRIBE:
 716                         if (!msginfo->extradata)
 717                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 718                         if (msginfo->extradata->list_unsubscribe) break;
 719                         msginfo->extradata->list_unsubscribe = g_strdup(hp);
 720                         break;
 721                 case H_LIST_HELP:
 722                         if (!msginfo->extradata)
 723                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 724                         if (msginfo->extradata->list_help) break;
 725                         msginfo->extradata->list_help = g_strdup(hp);
 726                         break;
 727                 case H_LIST_ARCHIVE:
 728                         if (!msginfo->extradata)
 729                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 730                         if (msginfo->extradata->list_archive) break;
 731                         msginfo->extradata->list_archive = g_strdup(hp);
 732                         break;
 733                 case H_LIST_OWNER:
 734                         if (!msginfo->extradata)
 735                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 736                         if (msginfo->extradata->list_owner) break;
 737                         msginfo->extradata->list_owner = g_strdup(hp);
 738                         break;
 739 /* end list infos */
 740                 default:
 741                         break;
 742                 }
 743         }
 744
 745         if (!msginfo->inreplyto && msginfo->references)
 746                 msginfo->inreplyto =
 747                         g_strdup((gchar *)msginfo->references->data);
 748
 749         return msginfo;
 750 }
 751
 752 gchar *procheader_get_fromname(const gchar *str)
 753 {
 754         gchar *tmp, *name;
 755
 756         Xstrdup_a(tmp, str, return NULL);
 757
 758         if (*tmp == '\"') {
 759                 extract_quote(tmp, '\"');
 760                 g_strstrip(tmp);
 761         } else if (strchr(tmp, '<')) {
 762                 eliminate_parenthesis(tmp, '<', '>');
 763                 g_strstrip(tmp);
 764                 if (*tmp == '\0') {
 765                         strcpy(tmp, str);
 766                         extract_parenthesis(tmp, '<', '>');
 767                         g_strstrip(tmp);
 768                 }
 769         } else if (strchr(tmp, '(')) {
 770                 extract_parenthesis(tmp, '(', ')');
 771                 g_strstrip(tmp);
 772         }
 773
 774         if (*tmp == '\0')
 775                 name = g_strdup(str);
 776         else
 777                 name = g_strdup(tmp);
 778
 779         return name;
 780 }
 781
 782 static gint procheader_scan_date_string(const gchar *str,
 783                                         gchar *weekday, gint *day,
 784                                         gchar *month, gint *year,
 785                                         gint *hh, gint *mm, gint *ss,
 786                                         gchar *zone)
 787 {
 788         gint result;
 789         gint month_n;
 790         gchar zone1[3];
 791         gchar zone2[3];
 792
 793         if (str == NULL)
 794                 return -1;
 795
 796         result = sscanf(str, "%10s %d %9s %d %2d:%2d:%2d %5s",
 797                         weekday, day, month, year, hh, mm, ss, zone);
 798         if (result == 8) return 0;
 799
 800         /* RFC2822 */
 801         result = sscanf(str, "%3s,%d %9s %d %2d:%2d:%2d %5s",
 802                         weekday, day, month, year, hh, mm, ss, zone);
 803         if (result == 8) return 0;
 804
 805         result = sscanf(str, "%d %9s %d %2d:%2d:%2d %5s",
 806                         day, month, year, hh, mm, ss, zone);
 807         if (result == 7) return 0;
 808
 809         *zone = '\0';
 810         result = sscanf(str, "%10s %d %9s %d %2d:%2d:%2d",
 811                         weekday, day, month, year, hh, mm, ss);
 812         if (result == 7) return 0;
 813
 814         result = sscanf(str, "%d %9s %d %2d:%2d:%2d",
 815                         day, month, year, hh, mm, ss);
 816         if (result == 6) return 0;
 817
 818         *ss = 0;
 819         result = sscanf(str, "%10s %d %9s %d %2d:%2d %5s",
 820                         weekday, day, month, year, hh, mm, zone);
 821         if (result == 7) return 0;
 822
 823         result = sscanf(str, "%d %9s %d %2d:%2d %5s",
 824                         day, month, year, hh, mm, zone);
 825         if (result == 6) return 0;
 826
 827         *zone = '\0';
 828         result = sscanf(str, "%10s %d %9s %d %2d:%2d",
 829                         weekday, day, month, year, hh, mm);
 830         if (result == 6) return 0;
 831
 832         result = sscanf(str, "%d %9s %d %2d:%2d",
 833                         day, month, year, hh, mm);
 834         if (result == 5) return 0;
 835
 836         /* RFC3339 subset */
 837         *weekday = '\0';
 838         result = sscanf(str, "%4d-%2d-%2d %2d:%2d:%2d+%2s:%2s",
 839                         year, &month_n, day, hh, mm, ss, zone1, zone2);
 840         if (result == 8) {
 841                 if (1 <= month_n && month_n <= 12) {
 842                         strncpy2(month, monthstr+((month_n-1)*3), 4);
 843                         *zone = '+';
 844                         strncpy2(zone+1, zone1, 3);
 845                         strncpy2(zone+3, zone2, 3);
 846                         return 0;
 847                 }
 848         }
 849
 850         /* RFC3339 subset */
 851         *zone = '\0';
 852         *weekday = '\0';
 853         result = sscanf(str, "%4d-%2d-%2d %2d:%2d:%2d",
 854                         year, &month_n, day, hh, mm, ss);
 855         if (result == 6) {
 856                 if (1 <= month_n && month_n <= 12) {
 857                         strncpy2(month, monthstr+((month_n-1)*3), 4);
 858                         return 0;
 859                 }
 860         }
 861
 862         return -1;
 863 }
 864
 865 /*
 866  * Hiro, most UNIXen support this function:
 867  * http://www.mcsr.olemiss.edu/cgi-bin/man-cgi?getdate
 868  */
 869 gboolean procheader_date_parse_to_tm(const gchar *src, struct tm *t, char *zone)
 870 {
 871         gchar weekday[11];
 872         gint day;
 873         gchar month[10];
 874         gint year;
 875         gint hh, mm, ss;
 876         GDateMonth dmonth;
 877         gchar *p;
 878
 879         if (!t)
 880                 return FALSE;
 881
 882         memset(t, 0, sizeof *t);
 883
 884         if (procheader_scan_date_string(src, weekday, &day, month, &year,
 885                                         &hh, &mm, &ss, zone) < 0) {
 886                 g_warning("Invalid date: %s\n", src);
 887                 return FALSE;
 888         }
 889
 890         /* Y2K compliant :) */
 891         if (year < 100) {
 892                 if (year < 70)
 893                         year += 2000;
 894                 else
 895                         year += 1900;
 896         }
 897
 898         month[3] = '\0';
 899         if ((p = strstr(monthstr, month)) != NULL)
 900                 dmonth = (gint)(p - monthstr) / 3 + 1;
 901         else {
 902                 g_warning("Invalid month: %s\n", month);
 903                 dmonth = G_DATE_BAD_MONTH;
 904         }
 905
 906         t->tm_sec = ss;
 907         t->tm_min = mm;
 908         t->tm_hour = hh;
 909         t->tm_mday = day;
 910         t->tm_mon = dmonth - 1;
 911         t->tm_year = year - 1900;
 912         t->tm_wday = 0;
 913         t->tm_yday = 0;
 914         t->tm_isdst = -1;
 915
 916         mktime(t);
 917
 918         return TRUE;
 919 }
 920
 921 time_t procheader_date_parse(gchar *dest, const gchar *src, gint len)
 922 {
 923         gchar weekday[11];
 924         gint day;
 925         gchar month[10];
 926         gint year;
 927         gint hh, mm, ss;
 928         gchar zone[6];
 929         GDateMonth dmonth = G_DATE_BAD_MONTH;
 930         struct tm t;
 931         gchar *p;
 932         time_t timer;
 933         time_t tz_offset;
 934
 935         if (procheader_scan_date_string(src, weekday, &day, month, &year,
 936                                         &hh, &mm, &ss, zone) < 0) {
 937                 if (dest && len > 0)
 938                         strncpy2(dest, src, len);
 939                 return 0;
 940         }
 941
 942         /* Y2K compliant :) */
 943         if (year < 1000) {
 944                 if (year < 50)
 945                         year += 2000;
 946                 else
 947                         year += 1900;
 948         }
 949
 950         month[3] = '\0';
 951         for (p = monthstr; *p != '\0'; p += 3) {
 952                 if (!g_ascii_strncasecmp(p, month, 3)) {
 953                         dmonth = (gint)(p - monthstr) / 3 + 1;
 954                         break;
 955                 }
 956         }
 957
 958         t.tm_sec = ss;
 959         t.tm_min = mm;
 960         t.tm_hour = hh;
 961         t.tm_mday = day;
 962         t.tm_mon = dmonth - 1;
 963         t.tm_year = year - 1900;
 964         t.tm_wday = 0;
 965         t.tm_yday = 0;
 966         t.tm_isdst = -1;
 967
 968         timer = mktime(&t);
 969         tz_offset = remote_tzoffset_sec(zone);
 970         if (tz_offset != -1)
 971                 timer += tzoffset_sec(&timer) - tz_offset;
 972
 973         if (dest)
 974                 procheader_date_get_localtime(dest, len, timer);
 975
 976         return timer;
 977 }
 978
 979 void procheader_date_get_localtime(gchar *dest, gint len, const time_t timer)
 980 {
 981         struct tm *lt;
 982         gchar *default_format = "%y/%m/%d(%a) %H:%M";
 983         gchar *str;
 984         const gchar *src_codeset, *dest_codeset;
 985         struct tm buf;
 986
 987         if (timer > 0)
 988                 lt = localtime_r(&timer, &buf);
 989         else {
 990                 time_t dummy = 1;
 991                 lt = localtime_r(&dummy, &buf);
 992         }
 993
 994         if (prefs_common.date_format)
 995                 fast_strftime(dest, len, prefs_common.date_format, lt);
 996         else
 997                 fast_strftime(dest, len, default_format, lt);
 998
 999         if (!g_utf8_validate(dest, -1, NULL)) {
1000                 src_codeset = conv_get_locale_charset_str_no_utf8();
1001                 dest_codeset = CS_UTF_8;
1002                 str = conv_codeset_strdup(dest, src_codeset, dest_codeset);
1003                 if (str) {
1004                         strncpy2(dest, str, len);
1005                         g_free(str);
1006                 }
1007         }
1008 }
1009
1010 /* Added by Mel Hadasht on 27 Aug 2001 */
1011 /* Get a header from msginfo */
1012 gint procheader_get_header_from_msginfo(MsgInfo *msginfo, gchar *buf, gint len, gchar *header)
1013 {
1014         gchar *file;
1015         FILE *fp;
1016         HeaderEntry hentry[]={ { NULL, NULL, TRUE  },
1017                                { NULL, NULL, FALSE } };
1018         gint val;
1019
1020         hentry[0].name = header;
1021
1022         cm_return_val_if_fail(msginfo != NULL, -1);
1023         file = procmsg_get_message_file_path(msginfo);
1024         if ((fp = g_fopen(file, "rb")) == NULL) {
1025                FILE_OP_ERROR(file, "fopen");
1026                g_free(file);
1027                return -1;
1028         }
1029         val = procheader_get_one_field(buf,len, fp, hentry);
1030         if (fclose(fp) == EOF) {
1031                 FILE_OP_ERROR(file, "fclose");
1032                 claws_unlink(file);
1033                 g_free(file);
1034                 return -1;
1035         }
1036
1037         g_free(file);
1038         if (val == -1)
1039                 return -1;
1040
1041         return 0;
1042 }
1043
1044 HeaderEntry *procheader_entries_from_str(const gchar *str)
1045 {
1046         HeaderEntry *entries = NULL, *he;
1047         int numh = 0, i = 0;
1048         gchar **names = NULL;
1049         const gchar *s = str;
1050
1051         if (s == NULL) {
1052                 return NULL;
1053         }
1054         while (*s != '\0') {
1055                 if (*s == ' ') ++numh;
1056                 ++s;
1057         }
1058         if (numh == 0) {
1059                 return NULL;
1060         }
1061         entries = g_new0(HeaderEntry, numh + 1); /* room for last NULL */
1062         s = str;
1063         ++s; /* skip first space */
1064         names = g_strsplit(s, " ", numh);
1065         he = entries;
1066         while (names[i]) {
1067                 he->name = g_strdup_printf("%s:", names[i]);
1068                 he->body = NULL;
1069                 he->unfold = FALSE;
1070                 ++i, ++he;
1071         }
1072         he->name = NULL;
1073         g_strfreev(names);
1074         return entries;
1075 }
1076
1077 void procheader_entries_free (HeaderEntry *entries)
1078 {
1079         if (entries != NULL) {
1080                 HeaderEntry *he = entries;
1081                 while (he->name != NULL) {
1082                         g_free(he->name);
1083                         if (he->body != NULL)
1084                                 g_free(he->body);
1085                         ++he;
1086                 }
1087                 g_free(entries);
1088         }
1089 }
1090